Romans 1:9

For God is my witness, whom I serve in my spirit in the gospel of his Son, how I unceasingly make mention of you always in my prayer;

Romans 9:1

I speak the truth in Christ, I lie not, my conscience bearing me witness in the Holy Ghost,

2 Corinthians 1:23

But I call God to witness to my soul, that sparing you I did not yet come into Corinth:

2 Corinthians 11:31

The God and Father of our Lord Jesus Christ, the one being blessed forever, knows that I lie not.

1 Thessalonians 2:5

For at that time we were not in word of flattery, as you know, nor in a pretext of covetousness, God is our witness;

1 Thessalonians 2:10

You are witnesses, and God, how sacredly and righteously and blamelessly we were unto you who believed:

Treasury of Scripture Knowledge

Summary

Also now, behold, my witness is in heaven, and my record is on high.

Bible References

My witness

Romans 1:9
For God is my witness, whom I serve in my spirit in the gospel of his Son, how I unceasingly make mention of you always in my prayer;
Romans 9:1
I speak the truth in Christ, I lie not, my conscience bearing me witness in the Holy Ghost,
2 Corinthians 1:23
But I call God to witness to my soul, that sparing you I did not yet come into Corinth:
2 Corinthians 11:31
The God and Father of our Lord Jesus Christ, the one being blessed forever, knows that I lie not.
1 Thessalonians 2:10
You are witnesses, and God, how sacredly and righteously and blamelessly we were unto you who believed: